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(FILES) In this November 7, 2013 file photo, a banner with the logo of Twitter is set on the front of the New York Stock Exchange (NYSE)in New York. Twitter shares fell hard July 29, 2015 after the latest update from the one-to-many messaging platform revived doubts about its growth prospects. In early trades, Twitter was down 13 percent at $31.82, the lowest level in over a year. Twitter on July 28 reported that it lost $137 million in the recently ended quarter on revenue that jumped 61 percent to more than half a billion dollars. While revenue growth was seen as positive, the sluggish increase in users sparked fresh worries among investors. AFP PHOTO/EMMANUEL DUNAND / FILESEMMANUEL DUNAND/AFP/Getty Images